maven仓库中心mirrors配置多个下载中心(执行最快的镜像)

<mirrors>
  <!-- mirror
   | Specifies a repository mirror site to use instead of a given repository. The repository that
   | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
   | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
   |
  <mirror>
   <!-- 唯一标识一个mirror -->
   <id>mirrorId</id>
   <!-- 代表了一个镜像的替代位置，例如central就表示代替官方的中央库 -->
   <mirrorOf>repositoryId</mirrorOf>
   <!-- 貌似没多大用，相当于描述 -->
   <name>Human Readable Name for this Mirror.</name>
   <!-- 是官方的库地址 -->
   <url>http://my.repository.com/repo/path</url>
  </mirror>
   -->
   <!--默认的中央仓库-->
   <mirror>
   <id>mirrorId</id>
   <mirrorOf>repositoryId</mirrorOf>
   <name>Human Readable Name for this Mirror.</name>
   <url>http://my.repository.com/repo/path</url>
  </mirror>
  <!--自定义添加-->
  <mirror>  
   <id>repo2</id>  
   <mirrorOf>central</mirrorOf>  
   <name>Human Readable Name for this Mirror.</name>  
   <url>http://repo2.maven.org/maven2/</url>  
  </mirror> 
  <!--阿里云镜像-->
  <mirror>  
      <id>alimaven</id>  
      <name>aliyun maven</name>  
      <url>http://maven.aliyun.com/nexus/content/groups/public/</url>  
      <mirrorOf>central</mirrorOf>          
    </mirror>
   <mirror>  
   <id>ui</id>  
   <mirrorOf>central</mirrorOf>  
   <name>Human Readable Name for this Mirror.</name>  
   <url>http://uk.maven.org/maven2/</url>  
  </mirror>  
 
	<mirror>  
   <id>ibiblio</id>  
   <mirrorOf>central</mirrorOf>  
   <name>Human Readable Name for this Mirror.</name>  
   <url>http://mirrors.ibiblio.org/pub/mirrors/maven2/</url>  
  </mirror> 
 
  <mirror>  
   <id>jboss-public-repository-group</id>  
   <mirrorOf>central</mirrorOf>  
   <name>JBoss Public Repository Group</name>  
   <url>http://repository.jboss.org/nexus/content/groups/public</url>  
  </mirror> 
  <!--访问慢的网址放入到后面-->
   <mirror>  
   <id>CN</id> 
   <name>OSChina Central</name>     
   <url>http://maven.oschina.net/content/groups/public/</url> 
   <mirrorOf>central</mirrorOf>  
  </mirror>
  <mirror>  
   <id>net-cn</id>  
   <mirrorOf>central</mirrorOf>  
   <name>Human Readable Name for this Mirror.</name>  
   <url>http://maven.net.cn/content/groups/public/</url>   
  </mirror> 
  <mirror>  
   <id>JBossJBPM</id> 
   <mirrorOf>central</mirrorOf> 
   <name>JBossJBPM Repository</name>  
   <url>https://repository.jboss.org/nexus/content/repositories/releases/</url> 
  </mirror> 
 </mirrors>